Method of producing matrices.



PATENTED MAY 21, 1907.

P. H." BROWN, 1. E. HANR-AHAN & G. A. BOYDEN. METHOD OF PRODUCINGMATRICES.

APPLIOATION FILED MAY 18 1906.

WITNESSES:

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1n: NORRIS PETERS 00., wasnlnm'un. u. c.

UNITED STATES PATENT OFFIOE.

FRANK H. BROWN AND JOHN E. HANRAHAN, OF BALTIMORE, AND

OF MOUNT WASHINGTON, MARYLAND, AS-

OOMPAN Y, OF BALTIMORE,

MARYLAND, A CORPORATION OF DELAWARE.

Specification of Letters Patent.

Patented May 21, 1907.

Application filed May 18, 1905. Serial No. 261,033.

To all whom it may concern:

Be it known that we, FRANK H. BROWN and J OHN E. HANRAHAN, of Baltimorecity,

and GEORGE A. BOYDEN, of Mount Washington, in the county of Baltimoreand State of Maryland, have invented certain new and useful Improvementsin Methods of Producing Matrices; and we do hereby declare the followingto be a full, clear, and exact description of the invention, such aswill enable others skilled in the art to which it appertains to make anduse the same.

This invention relates to matrix making, the object of which is toprovide a method for thoroughly filling in or backing up the depositionforming the type character in the matrix plate. I

With the introduction of the sorts machine for casting type, invented bythese same inventors, the art of producing type at this time isbeingrevolutionized, for the reason that instead of making type underthe present foundry practice, with skilled labor, and then distributingthe type throughout the country for printers to use, the printers arenow producing type in their ofiices with unskilled labor. This resultsin a great saving of time-and money and affords convenience in procuringimmediately type and sorts when desired. This invention necessitated thecreation of various systems and inventions, not only with relation tothe type casting machine proper, but also in molds, mold making,matrices and matrix making, and to one of these systems the presentinvention relates.

In the accompanying drawing :Figure 1 illustrates a front view of thecasting surface of a type matrix, showing the brass plate a, the electrodeposition 6 and the character 0. Fig. 2 is a section of Fig. 1 on lineX, showing the hollow shell of the deposition after the same has beenremoved from the battery. Fig. 3 is a similar view of Fig. 2 with apiece of filling metal laid in position ready to be fused. Fig. 4 is asimilar View to the preceding ones with a flame from a blow pipe actingon the filling metal. Fig. 5 is a similar View with the metal fused andmelted down, thoroughly filling all crevices in the shell. Fig. 6 is asimilar view with the excess deposition and the excess filling metalfinished off flush with the back of the matrix.

The general practice heretofore in creating the deposition forming thetype character of matrices has been to keep a matrix plate in thebattery until suflicient deposition took place to entirely fillthe holein the matrix plate. However, this took considerable time, which is animportant element where matrices have to be made rapidly andeconomically to fill large and numerous orders. By this invention, thematrix plate is only subjected to the de osition process long enough toform a fair y thick shell thereof, after which it is removed from thebattery, and in the'cavity of the shell so formed a piece of metal of alower fusing temperature than that of the deposition is placed. This isthen subjected to the flame of a blow pipe which thoroughly and quicklymelts the inserted softer metal and thoroughly unites the latter withthe deposition. By this method the delicate shell formed by thedeposition is in no manner damaged or destroyed. At the same time itthoroughly fills up all the crevices in the shell, making the whole acomparatively solid mass, by which as efficient matrices are made asthough the whole deposition were solid, but in considerably less timeand at reduced cost. This method is exceptionally valuable where a largenumber of matrices is to be made at reduced cost in order to bring thelatter within a non-prohibitive price so that printers can afford topurchase large numbers of matrices to be used in connection with thesaid sorts machine.

Having described our invention, what we claim and desire to secure underUnited States Letters Patent is 1. The method of producing matricesconsisting in subjecting a matrix plate having an opening therein, toelectrical de osition to form a thin, relatively deep shel spanning saidopening, and finally fusing a backing of metal in said shell by means ofheat driven directly down upon the shell and backing metal.

2. The method of producing matrices consisting in subjecting a matrixplate having an opening therein, to electrical deposition to form athin, relatively deep shell spanning specification in the presence oftwo subscribsaid opening, then fusing a backing of metal ing Witnesses.

in said shell by means of heat driven directly FRANK H. BROWN down uponthe shell and backing metal, and JOHN E. HANRAHAN. 5 finally completingthe matrix by dressing OH GEORGE A. BOYDEN.

said backing and the edges of said shell flush Vitnesses:

with the back of said plate. ELDRIDGE E. HENDERSON,

In testimony whereof, We have signed this 0. WALTER GWIN-N.

